Filtering apparatus



March 13, 1928.

6 1,662,726 J. B. VERNAY FILTERING APPARATUS Filed Feb. 16, 1927 4 Sheets-Sheet 1 @@cmbdb@ Q @@wcmw@ @@Qml@ March' 13, l 928.

J. B, VERNY FILTERING APPARATUS Filed Feb. 164 1927 4 Sheets-Sheet 2 `March 13, 1928.

1,662,726 J. B. VERNAY FILTERING APPARATUS Filed Feb. 16 1927 4 Sheets-Sheet 4 'ulllllll/ Patented Mar. l 13, 1.928.`

I UNITED STATES I JEAN BAPTISTE VEBNAY, F VILLEUBIBANN E, FRANCE.

FILTEBING' APPARATUS.

Application led February 18, 1927, Serial No. 168,736, and in France lFebruary 24, 192C.

Y *This invention refers to a filtering appaiqratus which vpermits of removin clear uld from a llquidcontaining soli matter 1n suspension, 1n order to make easler and quicker the work of the filter proper such.

as, for instance, a filtering drum.

The object of this invention is to improve the ap aratus and to provide automatic means For continuous working.

In the annexed drawings:

Fig. 1 is a view of a ltering cell wit parts in vertical section.

Fig. 2 is a plan view of an apparatus comprising forty-eight cells.

Fig. 3 1s a vertical section on line (Fig. 2).

Fig. 4 is an enlarged plan view of the mechanism controlling the valves.

*Fi 5 is a vertical section on line B-B- (Fig. 4). n Fig. 6 is a schematic view of the drivlng gear of the mechanism.

' The cell (-Fig. 1) 's a substantially cylindrical box 1 with a perforated side wall and closed ends. A filtering cloth 2 is wrapped valves being inserted in said connections.

When the cell is connected'to the pump, clear filtered liquid enters box 1 through the filtering cloth 2 and solid matter 1s deosited on the outer surface of cloth 2. When, on the contrary, the cell is connected to a compressed air iping,the layer of solid om cloth 2 and falls on the cells matter is removed the bottom of the tank in which are immersed..

The automatic machine or apparatus of Figs. 2 to 6 comprises a number of such cells (forty-ei ht in the example represented). These ces are arran ed in eight sections, each comprising six ce ls which work simultaneously, the upper ends 5 ofy their inner tubes being Aconnected to a tube 7, and the lower ends 6 with a tube 8. The tubes 7 and are automaticallyv operated b -ing 'insured by sprin 13 and' l14 are control ed by cams 19 and 20 keyed ona shaft 21 (Figs. 2 and 3)k which' runs parallel to pipes 9 and 10. Cam 19 8 of a section are respectively connected to a compresseid air pipe 9 andto a 1owpressure pipe-10,through valves 11 and 12 (sec Ihg's. 3, 4; and 5).`

hese valves 11 and 12 (F' s. 4 and 5) svers 13 and 14, fulcrumed at 15 and 16, t eir closing be- 17 and l18. Levers (which controls lever 13 and valve 11) is a sort ofradlal arm which acts onlever 13 for only a reduced angle of rotation.

cams are adjusted in .such a manner that valve 11 opens when valve 12 closes .and that valve 12 opens when 11 closes.

When shaft 21 is rotated, valve 12 being opened and valve 11 closed, the cells of the section lare connected with the low pressure pipe 10 and clear liquid is removed from the tank 23 in which the cells are immersed. This operation lasts for. the greatest part of a rotation of shaft 21. When cam 19 acts `on` lever 13, valve 11 is opened, but, as

aforesaid, notch 22 simultaneously releases valve 12r which is closed by spring 17. The

ce1/ls are then connected with the compressed air pipe 9 and the coating of matter which has been deposited on the -cloth of the cells Cam 2O,4 on the contrary, isa disk provided with ya perlpherical notch 22,l and actscontinuously on lever 14 except for a small angle. The

is driven away and falls on the bottom of tank 23.

f As shown in Fig. 3, this bottom is V- shaped in section and a screw'24 arranged along its lower edge. Screw 24 is driven by any appropriate gearing (not shown).

The liquid to be treated enters the tank through trough or conduit 25p. The outlet of said tank isv represented at 26 and. screw 24 acts to convey to the outlet 26 the mud.-

like mattei' which falls from the cells.'

The continuous workin ent sections along shaft 21 in successive angular positions, the sections being conl nectcd successively (and not simultaneously) with the compressed air pipe 9.

The rotation of shaft 21 is preferably of a `jerky character in-order to avoid any simultaneous opening of valves 1 1 and. 12. This vis obtained by arranging the cams 19 an 20 of the differis obtained Fig. 6) by imparting a step-bystep rotary movement to shaft 2l by means of a one-toothed gear 27 which acts on the successive teeth of a gear wheel 28 keyed onsaid shaft. The number. of teeth of gear 28 is such that the successive stops of shaft 21 correspond (in angular positions) to the wide kopening or closing of any of the valves 11 and 12v and never to an intermediate pov` sition of the same. 11n the example shown in the drawings, there are assumed to 'be sixteen teeth on gear 28 for eight sections of cells. Eight of the sixteen positions obtained correspond to the connectionV of a section with the compressed -air pipe, whereas in the other eight positions the eight sections are disconnected from said pipe and connected with the low-pressure pipe 10.

The arrangement of the single inner tube 4 permits of using a reduced vacuum 1n pipe 10, as gravity helps the pump 1n removing liquid from tank 23.

Instead of compressed air, liqmd under pressure or any other fluid might be employed for removing'the coating of solid matterl on cloth 2. The working would be the'same.

What I claim is: o 1. A filtering apparatus, comprising 1n combination a set of filtering cells of substantially cylindrical shape, each having an inner perforated tube extending therethrough from end to end; a tank wherein said cells are disposed, adapted to contain a diluted mixture of liquid and solid matter to be filtered; the upper ends of said tubes being connected to a source of fluid under pressure and their lower ends to a low-pressure line; valves in both connections; and means for automatically operating said valves in order to connect said cells alter.l nately with the low-pressure line throu h the lower ends of their tubes. and with t e fluid under pressure through the upper ends of said tubes. v

' 2.\A filtering apparatus according -to l claim 2 in which the cells are distributed in sections; the upper and lower ends of the tubes ofthe cells of a section being respectively connected in parallel, whereby each section is controlled by two valves; said apparatus comprising means for operating the valves of the sections in successive order, whereby always at least one section is connected with the low-pressure line and the removal of filtered liquid from the mixture to be filtered is continuous.

3. A filtering apparatus comprising 1n combination a tank containing the mixture to be filtered; filtering cells immersed in said tank, each cell comprising a substantially cylindrical box having a per orated cylindrical wall with filtering cloth there`l on, and an inner perforated tube extendin through said box-from end to end, sai

tions; cams for operating said valves; and

trolling the valves of the line of fluid under pressure being in the form of radial arms, andthe cams controlling the valvesof the lowfpressure line being in the form of' ,notched disks; and means for rotating .si-

multaneously all the cams, said means being arranged to avoid the simultaneous con-` nection of a section with both the line of' fluid under pressure and the low-pressure line, whereby a section-is connected successively -with the low-pressure line for a length of time and then with the-line of fluid under' lpressure for a much shorter time.

4.A filtering apparauts according to claim 4 in -whic the cams are arranged in such a way that the sections are operated in successive order, whereby at least one section is always connected with the lowres-y sure vline and the removal of liquid om the diluted mixture to be filteredis continuous.

5. A filtering apparatus comprising in combination a `tank into which the mixture .to be filtered is admitted; filtering cells'immersed* in the mixture in said tank, said cells being distributedl in sections, the inlets and outlets of the cells of a section beinv-respectively connected in, parallel with a tline of fluid under pressure and with a low-pressure line; valves in said connecmeans for impartin a jerky rotary motion to all the cams simu taneously, the `different stops of such motion corresponding to the complete closing or opening of any Aofi-said valves. f

6. A flterin apparatus according to l claim 6 in whic the means for rotating the cams simultaneously are arranged in such a way that the sections are operated in successive order, whereby vat least one section is always connected with the lowLpressure line and the removal of filtered liquid from the diluted mixture to be filtered is continuous.

7. A ltering apparatus, comprising in combination a tank into which the mixture to be filtered is admitted; filtering cells immersed in the mixture in said tank, said cells being distributed in sections, the inlets and outlets of the cells of a section bein respectively connect d in parallel with a ine of fluid under p essure and with a lowpressure line; valves in said connections; cams for operating said valves; a common shaft on which said cams are keyed; a gear wheel on said shaft; and a onetoothed driving pinion for said gear wheel for imparting to the same a jerking motion; of said gear wheel bein such that the difsaid cams being angularly positioned on ferent successive stops o said common shaft said shaft in such a way that the diierent corres ond to the complete opening or clos- 10 sections are successively connected for a ing o any of the valves.

5 le h of time with the low-pressure line In testimony whereof I affix my signature.

an for a muchvshorter time with the. line of fluid under pressure; the number o f teeth JEAN BAPTISTEy VERNAY. 

